Glossary
What is attribution window?
Melvin Salas1 min read
Short answer
An attribution window is the length of time a platform will credit a conversion back to an ad interaction, for example Meta's default 7-day-click, 1-day-view. Change the window and the same underlying conversions redistribute across campaigns differently, which means a reported performance swing after a window change is a measurement artifact, not a real change in results.
Every ad platform has to draw a line somewhere: how many days after someone clicks or sees an ad does a purchase still count as caused by that ad? That line is the attribution window, and platforms set different defaults (Meta's has moved between 1-day and 7-day click windows over time; Google Ads uses a data-driven or last-click model with its own lookback).
The reason this matters more than it sounds: attribution windows aren't just a reporting preference, they change which campaigns get credit for which conversions. A brand campaign with a long consideration cycle looks worse under a short window (its conversions happen too late to count) and a retargeting campaign looks artificially strong under a long window (it's catching credit for demand a brand campaign actually generated upstream).
The practical failure mode: a platform changes its default window, or an advertiser changes it manually, and the reported numbers jump. Read that jump as a market win or loss and you'll make a real budget decision on a measurement artifact. The fix is simple but often skipped: never compare conversion counts across an attribution-window change without noting the change happened, and prefer platform-level trends (which usually stay on a consistent window) over cross-window comparisons.
We check this on every account we run
Riibon ties Meta and Google Ads back to outcomes measured outside the platforms, payments and bookings, so the number a decision rests on is one the business would recognise. When the platform and the business disagree, we show both and say which one we trusted.
Ask the Riibon app what your own account is counting as a conversion. Access starts with a short call: we look at your ads together, then run them for you or set the app up with you.